I have a diagram with 4 hidden tables that hold data.
I want to implement undo and redo, and to ignore the changes in the tables;
however compositecmd doesn't seem to be working for me.

I wrap the code creating the tables in
   CompositeCmd composite = new CompositeCmd(diagram, "maketables");
   //code to make tables is here
   composite.Execute();

however when I look at diagram.UndoManager.History.Commands[.]
I get 9 commands
  Create
  Change table
  Create
  Change table
  Create
  Change table
  Create
  Change table
  maketables

this same happens when a table is modifed in the program, I get 'Change table' for each modification I make

any ideas why compositecmd is not catching these changes?
Should I try and keep track of when this happens and use MergeUndoRecords() to fix it
thanks
Bill